Western Canadian Select Price
Western Canadian Select heavy crude oil, the primary Canadian oil benchmark. Priced at Hardisty, Alberta, at a discount to WTI that reflects quality and pipeline capacity. Access timestamped benchmark data through the OilPriceAPI REST API.
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GET /v1/prices/latest?by_code=WCS_CRUDE_USD → $68.90Timestamped Updates
Western Canadian Select responses include source timestamps for workflow freshness checks
Freshness Metadata
Responses include timestamps so customers can monitor whether a benchmark is fresh enough for their workflow
API Integration
Simple REST API with comprehensive documentation and code examples
About Western Canadian Select
Market Overview
Western Canadian Select heavy crude oil, the primary Canadian oil benchmark. Priced at Hardisty, Alberta, at a discount to WTI that reflects quality and pipeline capacity.
Key Information
- Category: Oil
- Unit: barrel
- API code: WCS_CRUDE_USD
- Freshness: timestamped response; cadence varies by source
Western Canadian Select is the benchmark for Canadian heavy crude. It is a blend of oil sands bitumen, conventional heavy oil, and diluent, priced at the Hardisty, Alberta storage and pipeline hub. WCS almost always trades at a discount to WTI — the WCS-WTI differential — and that spread, more than the outright price, is the number that Alberta producers, refiners, and the provincial treasury watch.
Why WCS trades at a discount to WTI
The discount has two structural components. Quality: WCS is heavy (around 20-21 degrees API) and sour (roughly 3.5% sulfur), so it yields less high-value product per barrel than light, sweet WTI, and only refineries with coking capacity can process it efficiently. Transport: the barrel is priced in landlocked Alberta and must travel by pipeline — or, at the margin, by rail — to reach refineries in the US Midwest and Gulf Coast, and that transportation cost is embedded in the differential.
A normal differential covers quality and pipeline economics. When egress is adequate, it sits in the low-to-mid teens per barrel. When production outruns pipeline capacity, the differential is set by the cost of moving the marginal barrel by rail — or by whether it can move at all. In late 2018 that dynamic blew the discount out beyond US$40 and prompted the Alberta government to impose production curtailment.
The Trans Mountain expansion changed the ceiling
The Trans Mountain pipeline expansion, in service since May 2024, nearly tripled capacity to the Pacific coast and gave Canadian heavy crude its first large-scale outlet that does not route through the US Midwest. Tidewater access means WCS-type barrels can price against Asian demand as an alternative, which caps how far the differential can blow out so long as spare pipeline capacity exists.
The differential still breathes with the pipeline balance: refinery turnarounds in the Midwest (the traditional home for Canadian heavy), Enbridge Mainline apportionment, diluent costs, and seasonal production swings all move it. Watching WCS without watching the differential misses most of the story.
Who watches the WCS price
Oil sands producers realize WCS-linked prices on unhedged production, and their capital plans key off the differential outlook. US Midwest and Gulf Coast refiners with coking capacity buy WCS as feedstock and treat the differential as their margin opportunity. The Alberta government forecasts royalty and tax revenue directly off WCS — a one-dollar move in the differential is worth hundreds of millions of dollars to the provincial budget over a fiscal year. And diluent demand links WCS volumes back to condensate markets.
Data freshness
Last source timestamp: Aug 14, 2026, 9:06 AM GMT
Western Canadian Select FAQ
What is the WCS-WTI differential right now?
Subtract the WCS price on this page from the live WTI price to get the current differential. Both pages show source timestamps, so you can confirm the two quotes are from the same trading session before computing the spread.
Why is WCS so much cheaper than WTI?
Two reasons: quality and geography. WCS is heavy and sour, yielding less gasoline and diesel per barrel without coking capacity, and it is priced at Hardisty, Alberta — far from refining centers, so pipeline or rail costs to market are baked into the price. The differential compensates the buyer for both.
Is WCS priced in Canadian or US dollars?
US dollars per barrel, like other North American crude benchmarks. Canadian producers' realized Canadian-dollar prices therefore move with both the WCS price and the CAD/USD exchange rate.
Did the Trans Mountain expansion fix the WCS discount?
It compressed the transportation component by adding nearly 600,000 barrels per day of egress to the Pacific, giving heavy barrels a non-US outlet. The quality component of the discount remains, and the differential still widens when Midwest refineries go into turnaround or when production growth eats into the new spare capacity.
What crude does WCS actually contain?
WCS is a marketed blend: bitumen and conventional heavy crude streams combined with sweeter synthetic crude and condensate diluent so it flows in pipelines. The blend is managed to a consistent specification at Hardisty, which is what makes it usable as a pricing benchmark.
Related benchmarks
The other leg of the WCS-WTI differential.
Alberta's gas benchmark — oil sands steam generation burns gas priced here.
The full Canadian picture: WCS, the differential, and AECO together.
The global benchmark tidewater WCS barrels ultimately price against.
Integrate Timestamped Western Canadian Select Data
Get timestamped western canadian select price data through the same API path powering this page. Start with one benchmark code and wire it into your workflow.
curl -H 'Authorization: Token YOUR_API_KEY' \ 'https://api.oilpriceapi.com/v1/prices/latest?by_code=WCS_CRUDE_USD'